Embedded Foundation Protection System Using Metallic Soap
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Solution Overview
Problem
Existing bandage wrap systems are inadequate for protecting metal foundations such as steel or iron utility poles and reinforced concrete, as they do not effectively provide protection against corrosion and biodegradation.
Innovation Solution
A bandage wrap system with an outer protective sheath and an inner hydrophobic mat impregnated with an oil-borne metallic soap, where the metal of the soap is more electropositive than the foundation, facilitating galvanic exchange for passive cathodic protection, and optionally enhanced with a copper foil laminate for oligodynamic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If copper naphthenate impregnated bandage wrap is used, then wooden foundation protection is achieved, but metallic foundation protection is not provided
Solution Approach 1:
The bandage wrap system is designed to protect multiple foundation types (wooden, metallic, and reinforced concrete) using a single integrated system. The wrap can be impregnated with different preservatives depending on the foundation material: copper naphthenate for wooden foundations and metallic soaps for metallic foundations, making the system universally applicable across different foundation types.
Solution Approach 2:
The chemical composition of the impregnating agent is changed based on the foundation material. For metallic foundations, metallic soaps are used instead of copper naphthenate, and the electrical properties (electropositivity) of the metallic soap are specifically selected to enable galvanic exchange with the metal foundation, providing cathodic protection.
2Device complexity
If traditional bandage wrap systems are used, then simplicity is maintained, but corrosion protection for metal foundations is insufficient
Solution Approach 1:
The bandage wrap comprises a composite structure with an outer protective sheath and an inner absorbent mat. The outer sheath provides physical protection and containment, while the inner mat absorbs and holds the preservative solution. This composite structure enhances the functionality of the simple bandage wrap system, providing both mechanical protection and chemical preservation.
Solution Approach 2:
The bandage wrap acts as an intermediary between the preservative chemical and the foundation. It absorbs the preservative solution and facilitates its controlled release and distribution around the foundation, ensuring effective contact and prolonged protection. The wrap mediates the interaction between the chemical agent and the foundation surface.
3Reliability
If metallic soap with electropositive metal is used, then galvanic exchange and cathodic protection are achieved, but biocidal effectiveness may be reduced
Solution Approach 1:
The system merges two protective functions into a single integrated solution: cathodic protection against corrosion and biocidal protection against biodegradation. By combining metallic soap (for galvanic protection) with the absorbent bandage wrap system (which can provide controlled release and extended contact time), both protection mechanisms work synergistically to protect metallic foundations from both corrosion and biological degradation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides significant corrosion protection for metal foundations and extends protection to wooden foundations, offering both biocidal and cathodic protection, potentially outlasting the service life of the foundation it protects, while also preventing biodegradation of the wrap.
Implementation Method 1
the metallic soap causes a galvanic exchange to occur with the metal contained within the foundation, providing for the passive cathodic protection thereof
Implementation Method 2
the metal of the metallic soap is more electropositive than that of the metal of the foundation... providing for the passive cathodic protection thereof
Implementation Method 3
The oil-borne metallic soap is readily absorbed by the hydrophobic mat
Implementation Method 4
enhanced with a copper foil laminate for oligodynamic effects
Data Source
AI summary
A passive cathodic protection process for preservation of embedded metallic foundations entails embedding a wrap around a metallic foundation. The wrap has an outer sheath and an inner absorbent mat to be in direct contact with the metallic foundation. The is also mat hydrophobic. The wrap is subsumed such that an upper edge of the wrap is accessible. An oil-based metallic soap is injected via the upper edge to impregnate the mat. The metallic soap is selected from a set of metallic soaps such that the metal of the metallic soap is more electropositive than the metal of the metallic foundation such that the metallic soap acts as an anodic solution for galvanic exchange with metal within the embedded metallic foundation for the passive cathodic protection thereof. For example, zinc naphthenate may be selected for steel or aluminium foundations thereby allowing for both passive cathodic protection and biocidal action.